77345623 has 2 divisors, whose sum is σ = 77345624. Its totient is φ = 77345622.

The previous prime is 77345551. The next prime is 77345627. The reversal of 77345623 is 32654377.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77345623 - 2⁹ = 77345111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77345627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38672811 + 38672812.

It is an arithmetic number, because the mean of its divisors is an integer number (38672812).

Almost surely, 2^77345623 is an apocalyptic number.

77345623 is a deficient number, since it is larger than the sum of its proper divisors (1).

77345623 is an equidigital number, since it uses as much as digits as its factorization.

77345623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 37.

The square root of 77345623 is about 8794.6360356754. The cubic root of 77345623 is about 426.0676694577.

The spelling of 77345623 in words is "seventy-seven million, three hundred forty-five thousand, six hundred twenty-three".